Jason Blum minted his reputation as a Hollywood producer with wildly lucrative genre franchises including Paranormal Activity, The Purge and Insidious, so it feels unexpected to find him in the thick of things this awards season with a legitimate contender. But, really, how unexpected can something be if it keeps happening? A Blumhouse production has been nominated for a Best Picture Oscar twice in the past four years (Whiplash in 2015, Get Out in 2018) and a third title…